Control excessive barking with our Ultrasonic Barker a discreet, clock-like design that works both indoors and outdoors. This deluxe device can be hung on trees, placed anywhere in your home, or set on surfaces. When activated by barking, it emits a safe high-pitched ultrasonic sound only dogs can hear. This gentle stimulus discourages barking, enhancing peace. Waterproof and durable compatible outdoor use, it has 3 sensitivity levels and a battery-saving "Off" mode. With limited usage and a 1-year warranty, it's safe compatible all dog breeds. Compact at 12cm x 6.5cm x 9cm, model K4 is the ultimate barking solution.